In April 2026, Paul Cahill settled a medical malpractice claim on behalf of the family of a man in his late 40s who died in hospital from a cardiac arrhythmia that should have been recognized and treated. The patient had been admitted with a non-ST-elevation myocardial infarction. He was on a telemetry ward, which exists for the explicit purpose of monitoring patients at risk of cardiac arrhythmia and alerting staff when intervention is required. During the night, the patient developed torsades de pointes, a life-threatening polymorphic ventricular tachycardia. The telemetry system did what it was designed to do: it identified the arrhythmia and generated alarms. The alarms went unanswered. Further alarms followed, including alarms indicating lead disconnection. The patient was not checked overnight. He was found deceased the following morning. The case settled before trial. The terms are confidential.
This case is doctrinally useful for what it illustrates about institutional duties in cardiac care, and about the predictable consequences of system failures in the monitoring of critically ill patients. The breach was not a single clinical decision. The breach was the failure of a monitoring system, designed and staffed for the purpose of catching exactly this kind of clinical event, to function on the night that it mattered. The damages were the loss of a man in midlife and the consequential losses suffered by his family.
The clinical context: NSTEMI and the need for telemetry
A non-ST-elevation myocardial infarction, or NSTEMI, is one of the two main categories of acute coronary syndrome. It is a heart attack in which the electrocardiogram does not show the classic ST-segment elevation that defines the more severe STEMI category, but in which the patient nonetheless has had myocardial injury, evidenced by elevated cardiac biomarkers (typically troponin) and a clinical presentation consistent with cardiac ischemia. NSTEMI represents one stop along a continuum that includes unstable angina at one end and STEMI at the other. The underlying pathology is generally an unstable atherosclerotic plaque in a coronary artery, with partial occlusion of blood flow to a region of the heart muscle.
The management of NSTEMI follows a recognized framework. The patient is admitted to a cardiac care unit or, as in many Ontario hospitals, to a telemetry ward where continuous cardiac monitoring is available. Antiplatelet therapy is started (aspirin, clopidogrel, ticagrelor, or prasugrel, depending on the patient and the institutional protocols). Anticoagulation is started (typically with a low-molecular-weight heparin or fondaparinux). Beta-blockers are started where not contraindicated. A statin is started. Coronary angiography is performed within 24 to 72 hours in most cases, with subsequent percutaneous coronary intervention or coronary artery bypass grafting as appropriate. Throughout this period, the patient is monitored continuously for arrhythmia, hemodynamic instability, and recurrent ischemia.
The reason for continuous cardiac monitoring in an NSTEMI patient is that arrhythmias are common and can be lethal. The damaged myocardium is an arrhythmogenic substrate: irritable cardiac muscle that can generate abnormal rhythms, ranging from premature ventricular contractions to sustained ventricular tachycardia and ventricular fibrillation. Some of these arrhythmias are self-limiting and require only observation. Others are immediately life-threatening and require defibrillation, electrical cardioversion, or pharmacological intervention within minutes. The clinical task of telemetry monitoring is to distinguish between the two categories in real time and to deliver the appropriate intervention before the patient deteriorates.
The clinical context: torsades de pointes
Torsades de pointes is a specific form of polymorphic ventricular tachycardia. The name (French for “twisting of the points”) describes the characteristic appearance of the rhythm on the electrocardiogram: the QRS complexes appear to rotate around the isoelectric baseline, producing a twisting morphology. The rhythm is generally associated with prolongation of the QT interval, which can be congenital (in patients with long QT syndromes) or acquired (from medications, electrolyte abnormalities, or other causes).
The clinical significance of torsades de pointes is twofold. First, it is a life-threatening arrhythmia in its own right: it produces a rapid ventricular rate (often 200 to 250 beats per minute or higher) that compromises cardiac output and can produce hemodynamic collapse. Patients in sustained torsades typically lose consciousness. Second, torsades can degenerate into ventricular fibrillation, a chaotic and immediately fatal rhythm that does not produce any effective cardiac output and that requires immediate defibrillation.
The management of torsades de pointes follows a structured framework. Pulseless torsades is treated as cardiac arrest, with immediate defibrillation and advanced cardiac life support. Pulsatile torsades is treated with intravenous magnesium sulfate (the first-line pharmacological intervention regardless of the patient’s serum magnesium level), correction of electrolyte abnormalities (potassium and magnesium), withdrawal of any QT-prolonging medications, and consideration of overdrive pacing in refractory cases. The window for effective intervention is short. A patient in sustained torsades who is not treated within minutes will deteriorate to ventricular fibrillation and cardiac arrest.
The detection of torsades on telemetry is generally straightforward. The rhythm has a characteristic morphology that triggers the telemetry system’s arrhythmia detection algorithms. The system generates an audible and visual alarm at the central monitoring station and, in many institutions, at the bedside as well. The alarm is a “lethal arrhythmia” alarm, which is the highest-priority alarm category in most institutional alarm hierarchies. The expected response time is measured in seconds to a few minutes, not hours.
The clinical context: telemetry alarms and lead disconnection
A modern hospital telemetry system generates many categories of alarm. The most clinically critical are the lethal arrhythmia alarms: ventricular tachycardia, ventricular fibrillation, asystole, and severe bradycardia. The system also generates alarms for non-lethal but clinically significant findings: atrial fibrillation, frequent premature ventricular contractions, supraventricular tachycardia, and changes in the ST segment that may suggest recurrent ischemia. The system also generates technical alarms: lead-off (indicating that one or more of the electrodes has lost contact with the patient or the wires), low battery, weak signal, and similar technical events.
The technical alarms are clinically important even though they do not directly identify a cardiac event. A lead-off alarm in a patient who has been monitored continuously can indicate that the leads have become physically detached (because the patient has moved, scratched, or rolled over), or that the patient has pulled the leads off intentionally or unintentionally. It can also indicate, in some circumstances, that the patient is deteriorating or has lost consciousness in a manner that has affected the lead-patient contact. In a patient who is acutely ill and being monitored for a specific reason, the standard of care generally requires that lead-off alarms prompt a bedside assessment to determine why the lead has lost contact, both to restore monitoring and to verify the patient’s clinical status.
The published patient-safety literature recognizes a well-documented phenomenon called alarm fatigue: the gradual desensitization of nursing and other clinical staff to the high volume of telemetry alarms, including frequent false-positive or low-priority alarms, leading to delayed or absent responses to genuine alarms. The Joint Commission and other patient-safety bodies have published guidance on the management of alarm fatigue, and many Canadian hospitals have implemented institutional protocols on alarm thresholds, alarm escalation, and the response expectations for different alarm categories. These protocols form part of the standard of care for nursing practice on telemetry wards.
The patient and the breach
The patient was a man in his late 40s. He had been admitted with an NSTEMI and was on a telemetry ward for the standard period of post-event monitoring. The clinical reason for telemetry was the same as the clinical reason for telemetry in any post-NSTEMI patient: he was at elevated risk of arrhythmia and the monitoring system existed to identify and respond to one if it developed.
During the night, the patient developed torsades de pointes. The arrhythmia was identified by the telemetry system. The system generated the alarms that it was designed to generate. The patient went without assessment.
Further alarms followed. The lead-disconnection alarms in particular are doctrinally significant. A lead-disconnection alarm in a patient who has just been generating a lethal arrhythmia alarm is not a routine technical alarm. It is, on the available facts, consistent with the patient’s deterioration: either because the patient lost consciousness and could no longer maintain lead position, because the patient was no longer breathing or moving and the leads had become dislodged, or because the patient had pulled them off in distress. In each of these scenarios, the standard of care required immediate bedside assessment.
The patient was not checked overnight. He was found deceased the following morning. The proximate clinical cause of death is consistent with torsades de pointes progressing to ventricular fibrillation and cardiac arrest, without the defibrillation or other intervention that the telemetry monitoring system existed to facilitate.
The standard of care
The standard of care for nursing response to telemetry alarms is established through expert evidence at trial. The expert is generally a registered nurse with experience on a telemetry ward, supplemented in some cases by expert evidence from a cardiologist on the interpretation of the specific alarms. Description here is general background.
The applicable formulation, adapted to the regulated nursing profession, is the standard of a reasonably prudent telemetry nurse in the same circumstances. The published guidance from the College of Nurses of Ontario, the Canadian Nurses Association, and the various institutional policies that prevail in Ontario hospitals together inform the standard. The published patient-safety guidance on alarm management, including the Joint Commission’s National Patient Safety Goals on alarm management, provides additional reference content.
The standard of care for response to a lethal arrhythmia alarm generally requires immediate assessment of the patient. The standard of care for response to a lead-disconnection alarm in a patient under active telemetry monitoring generally requires timely assessment of the patient to determine the cause of the disconnection and the patient’s clinical status. The standard generally requires documentation of the response in the patient’s chart. Where the alarms are unanswered, where no assessment is performed, and where the failure persists across multiple alarms over an extended period, the inference that the standard of care was not met is generally available to the trier of fact.
The hospital, as the institutional defendant, has separate duties that may overlap with or exceed the duties of the individual nurses. These institutional duties include the design and implementation of alarm management policies, the staffing of telemetry wards at appropriate ratios, the training and competency assessment of nurses assigned to telemetry, the maintenance of alarm escalation protocols, and the audit and quality improvement processes that should identify systemic problems before they become catastrophic. Where the institutional duties are not met, the hospital may be directly liable, in addition to any vicarious liability for the conduct of nursing staff.
The legal framework
A wrongful-death claim arising from a failure of in-hospital monitoring in Ontario is analyzed under the standard four-element negligence framework.
Duty of care. The hospital, the nursing staff, and the physicians involved in the patient’s care all owe a duty of care to the patient. The duty is uncontested in cases of this type.
Standard of care. As discussed above, the standard of care for nursing response to telemetry alarms is established through expert nursing evidence. The hospital’s institutional duties are addressed through additional expert evidence on hospital administration, patient safety, and alarm management.
Damages. The damages in a wrongful-death case for a patient in his late 40s are substantial. The damages framework includes:
- Past loss of income from the date of death.
- Future loss of income over the patient’s remaining working life. A patient in his late 40s typically has 15 to 20 years of remaining working life. The lost-earnings claim depends on the patient’s employment history, his earning trajectory, and the dependency calculation for surviving family members.
- Loss of housekeeping and family services that the patient provided.
- Funeral expenses.
- Family Law Act claims of the patient’s spouse, children (where applicable), parents, siblings, and other qualifying family members for loss of guidance, care, and companionship. In a wrongful-death case involving a patient in midlife with dependent children, the Family Law Act claims are typically significant.
- Pain and suffering of the patient during the brief period of the cardiac event itself, though this category is generally a smaller component in wrongful-death claims than in cases where the patient survives with chronic disability.
The damages structure produces a substantial claim. The settlement reflects the parties’ assessment of how the damages evidence would have developed at trial.
Causation. The causation analysis would have addressed two questions. The first is whether the failure to respond to the alarms caused the death. The plaintiff’s case would have rested on expert cardiology evidence that timely intervention (defibrillation, magnesium sulfate, or both) would more likely than not have terminated the torsades and prevented progression to fatal ventricular fibrillation. The second is whether the alarm-management and staffing systems at the institutional level were a cause of the death in addition to the individual nursing response failure. The “but for” test from Clements v Clements, 2012 SCC 32, applies to each question. The defence position would have explored whether the patient’s underlying cardiac condition made fatal outcomes likely regardless of the staff response, but the available cardiology evidence on the management of in-hospital torsades de pointes is generally favourable to the plaintiff’s case where the alarm was the patient’s first decompensation event.
The resolution
The matter resolved by settlement in April 2026. The settlement was reached before trial. The terms are confidential.
Why this matters
For patients admitted to hospital for cardiac care, the lesson is that the value of telemetry depends on the response system that surrounds it. The technology that identifies an arrhythmia in real time is useless without the nursing and medical staff who can intervene in time. A family member with a patient on a telemetry ward is entitled to ask about the alarm-management protocols, the nursing ratios, and the escalation processes that govern the response to a critical event. A patient who has experienced a near-miss alarm response is entitled to ask for documentation of the response.
For nursing and hospital practice, the case illustrates the doctrinal and clinical importance of treating alarm response as a core competency rather than an administrative task. Alarm fatigue is a documented phenomenon and a recognized patient-safety hazard, but it is not a defence to a failure to respond to a lethal arrhythmia alarm. The institutional response to alarm fatigue is the development of better protocols, better triage of alarm priority, better staffing, and better training. The institutional response is not the normalization of unanswered alarms. Where the response system fails, the consequences fall on the patient and the family.
For the broader practice of medical malpractice litigation in Ontario, this case joins the institutional-monitoring sub-cluster in the notable-cases library. The closest analogue in the library is the October 2016 CPAP oxygen tubing disconnection case, where an in-hospital monitoring and response failure produced a fatal outcome in a patient whose deterioration should have been preventable. The two cases share an analytical structure: the patient was in hospital under active management, the deterioration triggered alarms or other indicators that should have prompted intervention, the response was inadequate or absent, and the patient died. The other entries in the broader system-errors sub-cluster (the esophageal intubation case in the emergency department, the hepatitis B surveillance case in family practice, the orthopedic follow-up amputation case after hospital discharge) illustrate the same analytical pattern in different clinical settings.
For prospective clients who have lost a family member in hospital under circumstances that suggest a failure of monitoring or response, the threshold question is whether the standard of care for the alarm management and response was met. The records of the telemetry monitoring (including the alarm log), the nursing documentation of the response, the institutional alarm management policies in force at the time, and the staffing levels on the unit are the starting points for the analysis. The two-year limitation period in Ontario runs from the date the family knew or ought to have known that the death was caused by an act or omission of the defendant; in a case where the alarm log and nursing records are the principal evidence, the limitation analysis may turn on when the family obtained access to those records.
Settlement Date: April 2026
Settlement Type: Confidential settlement before trial
Defendants: Hospital and nursing staff (not named)
Counsel for the plaintiffs: Paul J. Cahill
